Discussion

4.2 Setting Router Information for the MIB-II System
Group
Problem
You need to define specific information about the router, such as its name and location,
to pass to the SNMP manager.
Solution
Set description, location, and contact information about the router:
[edit snmp]
aviva@router1# set description "JUNOS cookbook M20, aka router1"
aviva@router1# set location "JUNOS cookbook kitchen"
aviva@router1# set contact "aviva at extension 12345"
Discussion
These commands provide general information, which is placed into objects in the
MIB-II system group, about the router to the SNMP manager. The description string
identifies the router and is placed into the sysDescription object. The location
describes the router’s physical location and is placed into the sysLocation object.
The contact identifies how to contact the router’s administrator and goes into the
sysContact object. The name of the router you configured when you installed the
router (the name in the set system host-name command) is placed into the sysName
object. You can set a different router name to be used just for SNMP:
[edit snmp]
aviva@router1# set name junos-cookbook-router
You can use a utility like snmpwalk from a Unix workstation to retrieve the agent’s
information. (snmpwalk uses SNMP GetNext requests to query a network entity for a
tree of information.) The following command uses the hostname of the agent
(router1), but you can also use the IP address:
aviva-server> snmpwalk -c public router1 system.sysDescr
system.sysDescr.0 = JUNOS cookbook M20, aka router1
aviva-server> snmpwalk -c public router1 system.sysContact
system.sysContact.0 = aviva at extension 12345
You can also get this information on the router itself. The following command shows
all the settings in the system MIB:
aviva@router1> show snmp mib walk system
sysDescr.0 = JUNOS cookbook M20, aka router1
sysObjectID.0 = jnxProductNameM20
sysUpTime.0 = 2888368
sysContact.0 = aviva at extension 12345
sysName.0 = junos-cookbook-router
Setting Router Information for the MIB-II System Group | 135
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